Since I Became A Commoner, My Engagement Was Annulled!Kizoku Kara Shomin ni Nattanode, Konyaku o Kaishou Saremashita! ; 貴族から庶民になったので、婚約を解消されました！

Two babies of different statuses were swapped by fairies. Raised as a noble, the-13-year old Anna became an adult. She who doesn't resemble her family at all, worried every day because she couldn't use her magic that well. One day, a fairy appears right in front of her...